Folding type chemical freezing package



April 21, 1959 R INS FOLDING TYPE CHEMICAL FREEZING PACKAGE Filed Nov.23, 1956 2 IN V EN TOR. 4254774. ioaa/M United States Patent FOLDINGTYPE CHEMICAL FREEZING PACKAGE Albert A. Robbins, West Covina, Calif.Application November 23, 1956, Serial No. 624,097 3 Claims. (Cl. 62-4)This invention relates to a chemical freezing package, and particularlyto a package in which the chemicals can be easily and simply mixed whendesired to reduce the temperature of the package, and also the packageis so arranged that it may be easily carried from place to place asdesired.

Another object of my invention is to provide a novel chemical freezingpackage which is so constructed that it may be folded in one positionthereof, and may be carried in this folded position and then may beunfolded to a straight or flat position when the chemicals therein areintermixed for the purpose of reducing the temperature of the package.

Other objects, advantages and features of invention may appear from theaccompanying drawing, the subjoined detailed description and theappended claims.

In the drawing:

Figure 1 is a perspective view of my folding type chemical freezingpackage.

Figure 2 is a side elevation of the same sition.

Figure 3 is a bottom plan view of the same in unfolded position.

It is well known in the chemical art that certain chemicals absorb heatwhen water is added thereto. The absorbed heat is obtained from adjacentbodies by means of conduction, convection or radiation, or possibly allthree. The freezing mixtures will be thus termed in the followingspecification and may include any of the following chemicals, or any oneof many others having the same properties. Some of these freezingmixtures have the following formulae:

NaczHgoz NH C1 NaNO3 N3 830:; KI

in folded po- CaCl, NH NO The addition of water to any of thesechemicals will cause a marked reduction in temperature in thesurrounding air or to adjacent articles. Consequently, a packagecontaining any of the freezing mixtures when enclosed in a box, carton,hamper, or container will lower the temperature therein and willmaintain a low temperature in foods, liquids, cans, bottles, etc., whichare placed within the containers, etc.

This application is a division application Serial No. 591,758, ChemicalFreezing Package.

In order that the freezing package may be easily carried from place toplace and, further, that it may be actuated to reduce temperature at anytime desired, I

of my previously filed filed June 15, 1956, for

provide a chemical freezing package of the folding type as follows: Anouter envelope or housing 1 is preferably formed of a plastic sheetmaterial, such as polyethylene, vinyl or acetate. This plastic sheetmaterial is usual and well known in the industry, and the sheets areformed with sufficient thickness so that they will not readily tear orbreak. Furthermore, the plastic sheet is sufficiently dense so thatgases will not readily pass therethrough. By gases is meant ammonia,chlorine, etc. The envelope 1 is preferably formed by heat sealing theedges 2, or by means of a suitable adhesive so that a completelyenclosed envelope is provided. A sealed partition strip 3 divides theenvelope 1 into two compartments 4 and 5. The sealed partition strip 3is preferably formed by placing a release type coating on the inside ofthe plastic sheet which forms the envelope and subsequent heat andpressure will seal the strip 3, thus forming the two compartments 4 and5. The compartment 4 is filled with a freezing mixture of a type such asspecified above, and the compartment 5 is either filled with water orwith a chemical containing free water molecules such as sodium carbonate(Na CO -j-5-l0H O). The partition strip 3, which is of the release typeas previously described, may be broken, separated or fractured byexerting pressure on either side of the envelope 1, or upon either ofthe compartments 4 or 5.

In order that a transportable package may be provided I fold theenvelope 1 along the sealed strip 3 and with the sealed strip at the topof the fold, as shown in Figure 1. A paper strip or handle 6 is attachedto the outside of the envelope 1 and along the sealed strip 3, thustending to hold the envelope 1 in its folded position, as shown inFigure 1. The handle 6 may also be formed with a slot 7 to facilitatecarrying the envelope. The lower edges 88 of the handle 6 are glued orotherwise attached to the outer surface of the envelope 1 and parallelto the sealed strip 3, so that when carried the envelope tends to dropinto a folded position. The envelope, however, can be flattened orplaced in a horizontal position, as shown in Figure 3, and in this flatposition the sealing strip 3 may be separated, fractured, or broken forthe purpose of intermingling the water or the hydrous chemical with thefreezing mixture.

Having described my invention, I claim:

1. A chemical freezing package comprising an outer sealed envelope, saidenvelope having a plurality of compartments therein, one of saidcompartments containing a dry freezing chemical mixture, another of saidcompartments containing a quantity of water, a separable sealing stripdividing said compartments, a handle secured to said envelope adjacentthe sealing strip, said envelope being folded over said sealing strip.

2. A chemical freezing package comprising a sealed envelope, theperipheral edges of said envelope being entirely sealed, a pair ofcompartments in said envelope, a release type sealing strip dividingsaid envelope into two compartments, one of said compartments containinga dry freezing chemical mixture, the second of said compartmentscontaining a quantity of water, said envelope being sealed along saidrelease type strip, a paper handle, and means attaching said handle tothe envelope adjacent said release type strip, whereby the envelope isretained in a folded position over said release type strip.

3. A chemical freezing package comprising an elongated rectangularenvelope sealed on the outer four edges Patented Apr. 21, 1959,

thereof, a release type sealing strip extending transversely' across theenvelope and dividing said envelope into two compartments, said sealingstrip extending from one peripheral edge of the envelope to anotherperipheral edge thereof, one of said compartments containing a dryfreezing chemical mixture, the second of said compartments containing aquantity of water, said compartments being sealed from each other alongsaid release type strip, a handle extending parallel to the release typestrip, and means": securing said handle to the outer surface of theenvelope parallel to the release typestrip and immedi'- ately adjacentthereto, said envelope being folded' over the release type strip when'supported by the handle and said=enyelope being extendableto' a flatelongated position when unsupported by the handle so that the water andthe freezing chemical mixture may be intermingledby separating therelease type sealing strip.

References Cited in the file of this patent UNITED STATES PATENTS1,487,114 McIntyre Mar. 18, 1924 1,899,286 Meagher Feb. 28, 19332,157,169 Foster May 9, 1939 2,515,840 Rodeck July 18, 1950 ,612,155Mendez Sept. 30, 1952 2,746,265 Mills May 22, 1956 FOREIGN PATENTS555,578 Great Britain Aug. 30, 1943

